Small issues encountered when learning shell scripts

1. Add-x to execute the shell script, and list the process when executing the script! (For beginners like me) sh-xshell (. /shell can also execute shell scripts, but there is no-x parameter) 2. when the number of passed values is greater than the

Linux network device driver overview

I. Overview Linux network device drivers follow common interfaces. the design adopts an object-oriented method. a device is an object (net_device structure ). The most basic methods for a network device are initialization, sending, and receiving.

After logging on to ubuntu, the system returns to the login page.

After logging on to ubuntu, I quickly returned to the login interface. a few days ago, I had a lot of work with the root user. later I found that the graphic interface could not be logged on. Google. Www.2cto.com solution: press CTRL + ALT + F1root

Delete iptables rules

The delete operation Sh code of the iptables rule www.2cto. comiptables-LINPUT -- line-numbers lists all the rules of the INPUT chain numtargetprotoptsourcedestination1REJECTtcp -... Delete iptables rule Sh code www.2cto.com iptables-l input --

Experience Sharing about installation failure of fedora14

Experience sharing about the installation failure of fedora14 recently learned the book "UNIX Network Programming 2nd-volume inter-process communication". I also wrote the author's code in www.kohaha.com to debug it and increase the experience! I

LinuxCentOS6.2x64 configure vsftpd Virtual User server

LinuxCentOS6.2x64 vsftpd configuration vsftpd Virtual User server recently configured a simple vsftpd server due to project requirements, combined with online information, sorted out the configuration steps for future reference: www.2cto.com 1.

Apache limits the size of log files

Apache limits the size of log files. even if a server is not busy, the log file contains a large amount of information. generally, access logs are increased by 1 MB or more for every 10000 requests. In this case, it is necessary to regularly scroll

How to enable other Enis when multiple Enis are restarted in Linux?

Linux multi-Nic restart does not automatically activate other NICs solution because the server usually has multiple NICs, the older server will inevitably be exhausted, the system automatically activates eth0 by default, if you want to activate

Linux2 machines can be logged on without a password

Linux2 machines can log on to the two machines with the following IP addresses without a password: 1. 10.207.27.2412. login to 10.207.27.241 without a password: 1. in... Linux2 machines can be logged on without a password The IP addresses of the

Linux/ubuntu free view of memory usage

In linux/ubuntu, if the free memory usage is large, you can see my memory usage: $ free-mtotalusedfreesharedbufferscachedMem: 19081844640... information & nbsp; | & linux/ubuntu free views the memory usage. for details, refer to my memory usage: $

Installation steps of linuxjdk + tomcat

Linuxjdk + tomcat installation step 1. check whether JDK installed java with root user login to the system, open a terminal input # rpm-qa | grepgcj display content contains the following information # java-1.4.2-gcj-compat-1.4.2.0-40jpp.112 # java-1

Solve the OOM: unabletocreatenewnativethread problem on RedHatLinux6.1

Solve the OOM: unabletocreatenewnativethread problem on redhat6.1 6.1 to run a large and complex Java system on the default RedHatLinux6.1. if this Java system starts multiple Java processes, every process has many threads... solve the OOM: unable

Centos + heartbeat + mysql configuration

Centos + heartbeat + mysql configuration 1: install two linux (rh4.5-32-bit) systems and disable the firewall. selinux is set to disable, and two NICs are required for each computer. The two computers are node1 and node2www. 2cto. the IP addresses

Nginx summary (2)

Nginx summary (2) nginx summary (1) http://www.2cto.com/os/201302/191860.html There are many configuration files. some www.2cto.com [root @ host2nginx] # catconf/nginx are listed below. conf | grep \ #-v # usernobody; user... nginx summary (2) nginx

ARMbusybox connects to NFS

Main steps for ARMbusybox to connect to NFS: Create an NFS server on the PC using www.2cto. com1. 2. check whether the NFS server is correct on the PC. 3 Telent on ARM Board busybox, mount-tnfs-onolock10.0.2.130:/export/home establish NFS service...

Linux Wireless ESSID: off/any error

Linux Wireless ESSID: off/any error I used Distribution is SUSE. I found that the wireless network could not be scanned yesterday. enter iwconfigwlan0 on the command line to get the result www.2cto. comwlan0IEEE802.11bgnESSID: off/any... linux

Summary of nginx (III)

Summary of nginx (3) summary of nginx (2) http://www.2cto.com/os/201303/192107.htmlnginx Summary: Web hosting configuration www.2cto. comusernginxnginx; worker_processes1; events {worker_connections1024;... nginx summary (III) nginx summary (II)

Ubuntu system performance analysis tool sysstat

Install sysstatwww.2cto. comsudoapt-getinstallsysstat in the Ubuntu system performance analysis tool sysstat to modify the configuration of sysstat, and change the ENABLED value in the/etc/defualt/sysstat file from & quot; false to & quot; true. Www.

Enable usb for virtualbox in ubuntu

In ubuntu, enabling the usb device for virtualbox does not support the usb device by default. you need to manually modify some settings to use it. Modify www.2cto. com1. add common user permissions to the usb device. 1.1 add a user group named usbfs,

Nginx common startup errors

Common Nginx startup errors sometimes when nginx is installed for the first time: www.2cto. comsbin/nginx-cconf/nginx. conf error message: sbin/nginx: errorwhileloadingsharedlibraries: libpcre. so.1: cannotop... common Nginx startup errors sometimes

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